This sample bag of the F26 Industrial Felt gives you a 3 inch x 3 inch square each of 1/2 inch, 1/4inch, and 1/8inch thickness. SAE F-26 Felt is made of 40% gray wool and has a density of 0.14-0.17 g/cm3. F-26 felt is a low density felt recommended for non-mechanical applications when retained between other materials. Common uses include padding and packing. This sample bag is a perfect way to match and select your grade of felt and be able to physically feel the felt. These can be kept in your swatch library to refer back to or for applications that need a smaller amount of industrial felt to work with.